Session Index

"Most sensors are based on an interferometer or resonator, of which a narrow resonance is modi ed by the parameter to be measured. The measurement is that of the amplitude of the signal transmitted by the resonator. The lower the losses, the highest the sensitivity, hence it is not surprising to expect the highest sensitivity in a laser where the gain compensates the losses. A small perturbation introduced inside the laser can affect its frequency, which in turns becomes a metric of that perturbation (caused by an electric or magnetic eld, rotation, acceleration, nonlinear index of refraction etc). The measurement is performed by interfering two frequency combs | a reference and a signal comb | on a detector. The signal to noise is exceptionally high (and optical path difference of less than 1 femtometer has been demonstrated) because the two combs are correlated, being created in a single (unstabilized) laser. It will be shown that this exquisite sensitivity can be enhanced by orders of magnitude inserting resonant elements inside the laser cavity. Prospects for the development of compact ber and integrated optics devices will be discussed."

 

In this work, we demonstrated microcavity lasing from various shapes of CsPbBr3 perovskites grown by vapor growth method. Upon optical excitation, room-temperature lasing with lowest lasing thresholds and highest quality factor was achieved from CsPbBr3 circular microdisk.

 

We demonstrated a novel structure for 940 nm wavelength high-speed vertical-cavity surface emitting lasers (VCSELs). Extra shallow apertures (~20 nm) were etched from the topmost current spreading (CS) layer, having Zn-diffusion and oxide-relief apertures inside. Comparative study of with and without etching of CS has been performed.

 

In this work, we demonstrate room-temperature random lasing at 960 nm from CsSnI3 perovskite thin films. We utilized chemical vapor deposition to grow CsSnI3 films on mica substrates. The near-infrared random laser offers simplicity in fabrication and operation, making an important capability into the emerging field of perovskite-based light emitters.

 

We demonstrate single-mode photonic crystal surface emitting lasers with low threshold performance of 0.45 kA/cm2. In addition, we prove that by the grating effects generated from the Indium-tin-oxide (ITO) cladding layer, the laser light emitting angle of the PCSEL can be modulated for the first time.

 

High Q-factor single-mode laser was achieved in CsPbI3 micro-spheres under extreme low threshold excitation. Size-dependent lasing threshold spectra and TRPL were measured to investigate the relevance with lasing threshold. Laser characteristics including side mode suppression ratio and Q-factor were deduced to verify the high quality of the single-mode microcavity laser.